Measuring Input Capacitor Voltage In 230/460 Volt Models And 575 Volt Models Eff W/Serial No. Ma380007G - Miller PipeWorx 400 Owner's Manual

9-6. Measuring Input Capacitor Voltage In 230/460 Volt Models And 575 Volt Models Eff
w/Serial No. MA380007G
2
230 VAC input:
+ lead to lower
terminal, − lead to
upper terminal
2
460 or 575 VAC input:
philips head wrench + lead to lower right
terminal, − lead to upper
5/16 in.
nutdriver
wirecutter
OM-236891 Page 86
1
3
3
crescent wrench
left terminal
chippinghammer
frontcutter
Have only qualified persons per-
form this procedure.
Disconnect and lockout/tagout in-
put power before removing side
panel. Follow established proce-
dures regarding the installation
and removal
devices.
Turn Off welding power source,
and disconnect input power.
Significant DC voltage can remain
on capacitors after unit is Off. Al-
ways check the voltage as shown
to be sure the input capacitors
have discharged before working
on unit.
Turn Off welding power source, and discon-
nect input power.
1 Right Side Panel
To remove panel, remove screws securing
panel to unit.
2 Relinking Board PC10
3 Voltmeter
Measure the DC voltage across the screw
terminals on PC10 as shown until voltage
drops to near 0 (zero) volts. If the capacitor
does not drop to near zero after 5 minutes,
contact a factory authorized service agent.
Proceed with job inside unit. Reinstall right
side panel when finished.
805142-B / 805145-A
of lockout/tagout